Harrow



(No Model.)

J. I. HOKE. HARROW.

Patented Apr. 19, 1892.

UNITED STATES PATENT OFFICE.

JOHN I. HOKE, OF SOUTH BEND, INDIANA.`

HARROW.

SPECIFICATION forming part of Letters Patent No. 473,155, dated April 19, 1892. Application led October 15, 1891. Serial No, 408,791. (No model.)

T0 all whom t may concern:

Be it known that I, JOHN I. HOKE, a resident of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and usefulImprovements in Harrows; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specication, in which- Figure 1 is a View of a portion of my improved harrow. Fig. 2 is a detail perspective view of the tooth-bar connections. Figs. 3 and 4 are detail sectional views ofthe connections of the tooth-bars to the side bars. Figs. 5 and 6 are Vsimilar views of the connection between the spring-teeth and bars. Fig. 7 is a detail perspective of a stepped grooved block.

This invention is an improvement in toothed harrows; and its objects are to improve the connection of the tooth-bars to the side bars, so that the tooth-bar can be adjusted to various angles, so as to give different inclinations or pitches to the teeth, and, second, to improve the connections of the teeth to the tooth-bars, so that each tooth can be independently and easily adjusted to different angles in relation to the bar.

To these ends the invention consists in the employment of stepped vblocks interposed between the side bars and tooth-bars and between the tooth-bars and the teeth, so that by locking the bars or teeth on different steps of the blocks the inclination of the bars or teeth may be varied, a's will be fully understood from the following description, and concisely stated in the claims.

Referring to the drawings by letters, A A designate the two side or draft bars of the barrow-frame, connected by aseries of transverse tooth-bars BB, secured thereto by bolts C O, which pass through corresponding openings in the bars A B at their points of intersection. The tooth-bars B are preferably U- iron bars set with their flanges downward.

D D are stepped blocks interposed between the bars A B, having depending end flanges d d on their bottom, which partially embrace the bars A, and their upper faces are longitudinally stepped orgrooved, as at B D on each side, the grooves or steps facing in op- -posite directions. The flanges of barsB rest on the steps D at opposite sides of the blocks, as indicated in the drawings, and by shifting the bars B the flanges can be set on parallel steps or steps in different planes, and thus the bars B be horizontal or laterally inclined backward or forward and at various angles, as indicated in the drawings. The bolts O pass through central slots d in blo'cks D, and thus bind the bars firmly together and clamp the blocks between them. They also prevent lateral movement of the blocks in relation to either bar. By this constructionv it willbe seen at once that by simply loosening bolts C the tooth-bars can be inclined 'as desired, and the teeth thereon of course be inclined therewith, so I thus provide' for the-adjustment of the tooth-bars.

The barrow-teeth E are preferably C-sprin g teeth vand of any suitable construction. In order to make each tooth independently adjustable, I preferably interpose stepped blocks F between the tooth-bar and the Shanks of the teeth and secure them by bolts G, as indicated. Blocks F have upstanding flanges ff on their ends, between which the shank-of the tooth is received and thereby kept from lateral movement on the block. The under surface of the block is longitudinally grooved,

the opposite sides of the groove being formed with steps F F facing in opposite directions, and are adapted to receive the tooth-bar, and the blocks can be set at various angles forward or backward in felation to the tooth-bar by engaging different opposite steps F therewith, as will be clearly understood from the drawings.

` It will be observed that both blocks D and F are stepped, the block D being adapted to receive a flanged bar and block F a square or rectangular bar. At the same time block F would act equally as well in connection with a U or channel bar. Therefore itwill be understood that block F could be substituted for block D and blockD for block F if achannel-iron was used, and that the adjustable connections of the tooth-bars to the side bars and of the teeth to the tooth-bars could be substantially alike and of either form desired. f

In practice as many tooth-bars and side IOC 3. The combination of the side bars and the tooth-bars, With the double-Stepp ed blocks interposed between the said bars at their meeting or intersecting' points, and the se-` curing-bolts transtixing said blocks and bars, substantially as specified.

4. The combination of the flanged toothV bar, thcadjustable double-stepped block bolted thereto, the opposite steps of the block engaging the flanges of the tooth-bar, and the tooth attached to said block and adjust-- able therewith, substantially as specified.

The combination of the side bars and the fianged tooth-bars bolted thereto, with the double-stepped blocks interposed between said bars, and the teeth connected to said tooth-bars, substantially as specified.

6. The combination of the bar, the grooved block having the opposite sides of its groove oppositely stepped, and the bolt transiixing said block and bar and uniting:r the saine, substantially as specified.

7. The combination of the side bars, the adjustable tooth-bars bolted thereto, and the double-stepped blocks interposed between said side and tooth bars, with the adjustable teeth bolted to said tooth-bars, and the doublestepped blocks interposed between said teeth and tooth-bars, all constructed and arranged to operate substantially as set forth.

In testimony that I claim the foregoing as my own I aihx my signature in presence of two witnesses.

JOHN I. HOKE. \Vit.ncsses:

JAMES DUSHANE, H. H. HUMPHREY. 

